Panasonic UF-490 / UF-4000 / UF-4100 Service Manual ▷ View online
101
4.4.14. Poor Printed Copy Quality
START
Is the Test Pattern printout
in Service Mode 3 normal?
in Service Mode 3 normal?
1. Replace the SC PCB.
2. Replace the Laser Unit (LSU).
3. Replace the Power Supply Unit.
4. Replace the Toner Cartridge
and/or Drum Unit.
2. Replace the Laser Unit (LSU).
3. Replace the Power Supply Unit.
4. Replace the Toner Cartridge
and/or Drum Unit.
END
Perform a receiving test
with the reference fax unit.
with the reference fax unit.
Is the printed copy correct?
Yes
No
Make a local copy.
No
Yes
Check the connections of connector
on the CIS and CN3 on the SC PCB.
on the CIS and CN3 on the SC PCB.
Is the received copy correct?
1. Check the Telephone Line Cable.
2. Replace the SC PCB.
2. Replace the SC PCB.
Yes
No
Is a poor copy printed only
when receiving from a
specific transmitter?
when receiving from a
specific transmitter?
Yes
No
Telephone line quality is poor.
The transmitting machine
may be defective.
may be defective.
102
4.4.15. Abnormal Printing
START
Is the recording paper loaded
in the Paper Tray properly?
in the Paper Tray properly?
1. Adjust the Paper Width Guide.
2. Adjust the Paper Length Guide.
2. Adjust the Paper Length Guide.
Is the Panasonic Toner
Cartridge being used?
Cartridge being used?
Yes
No
Is the recording paper size and
thickness within specification?
thickness within specification?
Yes
No
Yes
No
Replace with correct paper.
Replace with the Panasonic Toner Cartridge.
Are all switches and sensors
operating properly?
Do the rollers rotate properly?
Yes
No
Are there any foreign particles
or paper pieces in the receiver
unit?
or paper pieces in the receiver
unit?
Yes
No
Remove the foreign particles or paper pieces
from the receiver unit.
1. Check all rollers, gears, drive clutches and
springs.
2. Adjust or replace any defective parts.
Adjust, clean or replace.
Yes
No
Is the receiving mechanism
operating correctly?
Yes
No
Adjust or replace any defective parts.
END
103
4.4.16. Scanned Copy Quality Problems
START
END
Are the Transmitting
Rollers dirty?
Rollers dirty?
Are there any foreign particles
or paper pieces in the scanning
area?
or paper pieces in the scanning
area?
Yes
No
Remove the foreign particles or paper
pieces from the scanning area.
pieces from the scanning area.
No
Yes
Is the scanning area dirty?
Clean the Scanning Glass (Sect. 2.2.2).
No
Yes
Clean the rollers (Sect. 2.2.2).
Is the CIS Assembly abnormal?
1. Check CN3 (SC PCB).
2. Check Connector (CIS).
3. Replace the CIS Assembly
(Sect.2.2.5)
4. Replace the SC PCB (Sect.2.2.4)
2. Check Connector (CIS).
3. Replace the CIS Assembly
(Sect.2.2.5)
4. Replace the SC PCB (Sect.2.2.4)
Yes
No
104
4.5.
Document Feeder (ADF)
4.5.1.
No Document Feed
START
END
Yes
No
Is the document set properly?
Set the document properly.
Yes
No
Is the document thickness or size
within specification?
Make a copy or cut the document
to the specification size.
Yes
No
the document is set?
Is the "Pi.." tone generated when
Does the ADF Sensor actuator
move smoothly?
Replace the PNL PCB.
No
Adjust or replace the actuator.
No
Yes
Yes
Replace the PNL PCB.
Yes
Yes
No
Does the ADF Roller rotate?
Replace the Motor.
Is the trouble solved?
No
Replace the ADF Roller or
Separation Rubber or both.
Yes
No
Is the ADF Roller surface dirty?
Clean the ADF Roller surface.
Adjust the separator pressure.
Is the trouble solved?
END
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